Make composited scrolling codepaths co-operate.

LayoutTests/TestExpectations

Index: LayoutTests/TestExpectations
diff --git a/LayoutTests/TestExpectations b/LayoutTests/TestExpectations
index 66514051ef1e0f4c1cdc63df7fb525daecbca21a..271200ac076212db4fc5cbd9d863030617d36cc3 100644
--- a/LayoutTests/TestExpectations
+++ b/LayoutTests/TestExpectations
@@ -627,6 +627,16 @@ webkit.org/b/91183 http/tests/w3c/webperf/approved/HighResolutionTime/test_cross
 # Flakes also on the V8 waterfall on Win7.
 Bug(senorblanco) [ Win ] http/tests/w3c/webperf/submission/Google/HighResolutionTime/worker-dedicated-basic.html [ Failure Pass ]
 
+Bug(hartmanng) compositing/overflow/universal-accelerated-overflow-scroll.html [ NeedsRebaseline ]
+Bug(hartmanng) virtual/gpu/compositedscrolling/overflow/universal-accelerated-overflow-scroll.html [ NeedsRebaseline ]
+Bug(hartmanng) virtual/softwarecompositing/overflow/universal-accelerated-overflow-scroll.html [ NeedsRebaseline ]
+
+Bug(hartmanng) virtual/gpu/compositedscrolling/overflow/content-loses-scrollbars.html [ NeedsRebaseline ]
+Bug(hartmanng) virtual/gpu/compositedscrolling/overflow/nested-render-surfaces-with-intervening-clip.html [ NeedsRebaseline ]
+Bug(hartmanng) virtual/gpu/compositedscrolling/overflow/nested-render-surfaces-with-rotation.html [ NeedsRebaseline ]
+Bug(hartmanng) virtual/gpu/compositedscrolling/overflow/nested-render-surfaces.html [ NeedsRebaseline ]
+Bug(hartmanng) virtual/gpu/compositedscrolling/overflow/overflow-scroll.html [ NeedsRebaseline ]
+
 # Fails since creation in 122663
 webkit.org/b/91372 [ Win ] css2.1/20110323/vertical-align-boxes-001.htm [ ImageOnlyFailure ]